Pros
It's good name recognition for your resume. It can give someone a lot of clout around Washington DC when they work at Booz Allen when compared to some of the other firms around here. It also gives a lot of insight to the way the consulting operations work, though they focus on government "consulting" rather than commercial. Booz Allen definitely has some opportunities for work-life balance, meaning, if you really want to work just a 40 hour week, there are opportunities here to do that. Don't expect big pats on the back for taking on a role like that, but it is not frowned upon neither.
Cons
Management really doesn't have visibility on what subordinates are doing. Sometimes it appears as if long as you are billable, they can care less about what you are doing. At the same time, networking really is the way to get ahead within the firm, but if you work on the client-site and never have that opportunity, you are at a big disadvantage. Booz Allen almost seems proud of the fact that they underpay their employees as well. When receiving a review and a pay raise for a promotion, my manager lauded the fact that Booz Allen does not pay as well as the firms in the area. They say it's due to the great benefits (which are actually nice), but moreso it is due to the fact that there is a MASSIVE overhead at Booz Allen and then the managers pocket the rest of the money as bonuses.